drove my van to work and when i went to start it again it wouldn't start. the mechanics had it three days, finally thought it was the crank sensor. i went picked it up drove it for a couple miles and it died all of the sudden. this happened before, it wouldn't start then i waited till the next day and it started right up and was fine for months. it's a 360 if that matters. does anyone have any ideas? this is my work van and i haven't had it for 5 days. thanks